What you really need to work on,as I told someone else yesterday, is not only ignoring the comments but not letting them effect you. You need to be able to brush them off and know that you're better then that -- no matter what they say just be able to be like, eh, whatever, I don't care, and I'm not gonna let whatever they say effect me. That's one thing to work on, but another would be to tell the school guidence counselor or a teacher (guidance counselor is better, but you can talk to whoever you feel comfortable with). Explain to them the whole story, don't leave anything out. Don't feel bad about giving names or anything, these people were mean to you and you do not have to be nice to them in return.
Here are some websites on dealing with bullies that might be able to help you out. I did my best but I'm of course not an expert ;).
TeensHealth: Dealing With Bullying
Stop Bullying Now!
Students Against Violence Everywhere (SAVE): Dealing With Bullies Without Making Things Worse
Hope this helps & good luck!